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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 2 month growth cycle. stored in the epididymis of the bull






2. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






3. Birthing process (termination of gestation)






4. Birthing process (termination of gestation)






5. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






6. Start of the reproductive tract for the female. located outside of the body






7. 265-285 days






8. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






9. Actual heat cycle (period)






10. ~305 days (altough often longer due to breeding difficulties)






11. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






12. Days which have decreasing daylight hours

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13. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






14. Sperm production






15. What makes the milk flow through the mammary glands?






16. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






17. 4-6 days






18. Milk is 15% ________ and 85% __________.






19. What makes the milk flow through the mammary glands?






20. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






21. Animal which has been castrated after puberty






22. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






23. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






24. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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25. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






26. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






27. Sperm production






28. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






29. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






30. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






31. When are dairy cattle dehorned?






32. Produce testosterone. located between the seminiferous tubules






33. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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34. Failure to have one testis (gonad) to descend






35. Prevent the cow from getting an infection from the calve






36. Urinary calculi.






37. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






38. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






39. Failure to have both testis (gonads) descend






40. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






41. Microscopic - make sure not sterile - very few bulls are actually tested






42. Produce testosterone. located between the seminiferous tubules






43. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






44. (LH) stimulates the Leydig cells to produce testosterone






45. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






46. The more stressed out the male is - the less sperm he is going to produce






47. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






48. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






49. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






50. Larger the cow - more milk is produced; smaller the cow - less milk is produced